participants are allowed to create one secret group. If they create another one than they automaticaly join the new group leaving the old group empty.
participants are only allowed to join one secret group.
Desired
each participant should be allowed to create multiple secret groups.
participants should be allowed to join multiple groups. For example, if a participant gets two secret codes from two different leaders the participant should be allowed to join the secret group of each leader.
Status Quo
Desired